DEREK E NEILSON MD
NPI 1548293822
Medical Genetics - Clinical Genetics (M.D.) in Phoenix, AZ
About Derek E Neilson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DEREK E NEILSON MD (NPI 1548293822) is an individual clinical genetics (m.d.) provider in Phoenix, Arizona, licensed in Arizona (56355) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 7
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Derek E Neilson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Derek Neilson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Phoenix, AZ 85016
- Reassigned Medicare billing, Arizona enrollment
- 1,416 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PHOENIX, AZ 85006
PHOENIX, AZ 85006
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Derek Neilson's NPI number?
The NPI number for Derek Neilson is 1548293822. It was assigned to this individual provider in the NPPES registry on July 9, 2006.
Where is Derek Neilson located?
Derek Neilson practices at 1920 E Cambridge Ave Ste 304, Phoenix, AZ 85006. The listed phone number is (602) 933-4363.
What is Derek Neilson's specialty?
The primary specialty registered for this NPI is Medical Genetics, specializing in Clinical Genetics (M.D.), with taxonomy code 207SG0201X.
Is Derek Neilson enrolled in Medicare?
Yes. Derek Neilson is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Derek Neilson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Derek Neilson reassigns Medicare benefits to Phoenix Children's Hospital (Phoenix, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Derek Neilson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Derek Neilson was last updated on July 10, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.